P802.1Qcr – Bridges and Bridged Networks Amendment: Asynchronous Traffic Shaping

The full title of this PAR is “Standard for Local and Metropolitan Area Networks – Bridges and Bridged Networks Amendment: Asynchronous Traffic Shaping”.

This project specifies procedures and managed objects for bridges and end stations to perform asynchronous traffic shaping over full-duplex links with constant data rates.

Asynchronous traffic shaping can be modeled as an additional layer of shaped egress queues to merge flows into the existing queue structure. The required minimum number of independent queues at an egress port is adjustable and is at least the number of ingress ports of the particular bridge that require merging.

The amendment specifies an information model for the capabilities of asynchronous traffic shaping. It further specifies a YANG data model and Management Information Base (MIB) modules both based on that information model to support configuration and status reporting. It further defines the relationship between the models introduced by this amendment, and the models in the base standard.

Additionally, this amendment provides an informative framework for worst case delay analysis in static networks with static configurations. This amendment also addresses errors and omissions in the description of existing functionality.

There is well defined traffic that requires zero congestion loss and deterministic latency. Current bridging standards do not provide a sufficiently fine grained asynchronous traffic mechanism to meet these requirements without using network topology information. This project specifies mechanisms that do not rely on synchronous communication, thereby providing independence from clock synchronization mechanisms and higher link utilization than synchronous mechanisms.

Current Status

Status
  • WG Ballot
  • PAR modification approved, Sep 27, 2018
  • CSD
  • PAR approved Jun 30, 2016
Editor Johannes Specht

Archive

Date Document
24 May  2019 802.1Qcr, Draft 1.0: Proposed comment dispositions version 3
23 May  2019 802.1Qcr, Draft 1.0: Proposed comment dispositions version 2
20 May  2019 802.1Qcr, Draft 1.0: Proposed comment dispositions version 1
16 Apr 2019 802.1Qcr, Draft 1.0
13 Sep 2018 802.1Qcr, Draft 0.5: Comment dispositions
1 Aug 2018 802.1Qcr, Draft 0.5: Proposed comment dispositions version 2
9 July 2018 802.1Qcr, Draft 0.5: Proposed comment dispositions version 1
12 June 2018 802.1Qcr, Draft 0.5
24 May 2018 802.1Qcr, Draft 0.4: Comment dispostions
24 May 2018 802.1Qcr, Draft 0.4: Proposed comment dispositions version 2
21 May 2018 802.1Qcr, Draft 0.4: Proposed comment dispositions version 1
26 Apr 2018 802.1Qcr, Draft 0.4
26 Jan 2018 802.1Qcr, Draft 0.3: Comment dispostions
24 Jan 2018 802.1Qcr, Draft 0.3: Proposed comment dispositions version 2
22 Jan 2018 802.1Qcr, Draft 0.3: Proposed comment dispositions version 1
22 Dec 2017 802.1Qcr, Draft 0.3
10 Non 2017 802.1Qcr, Draft 0.2: Comment dispostions
06 Nov 2017 802.1Qcr, Draft 0.2: Proposed comment dispositions
20 Oct 2017 802.1Qcr, Draft 0.2
20 Oct 2017 802.1Qcr, Draft 0.1: Comment dispositions
27 Jun 2017 802.1Qcr, Draft 0.1: Proposed comment dispositions version 2
15 May 2017 802.1Qcr, Draft 0.1: Proposed comment dispositions version 1
26 Apr 2017 802.1Qcr, Draft 0.1
09 Jan 2017 802.1Qcr, Draft 0.0

Presentations

Date Document
21 May 2015 Presentation new-tsn-specht-ubs-queues-0521-v0.pdf
24 May 2016 Presentation Qcr-specht-specification-mapping-proposal-0516-v01.pdf
27 Jul 2016 Presentation cr-nadas-combining-ATS-and-SRS-0716-v01.pdf
13 Sep 2016 Presentation cr-nadas-combining-ATS-and-SRS-0916-v01.pdf
10 Nov 2016 Presentation Qcr-specht-editing-1116-v01.pdf
12 Dec 2016 Presentation cr-nadas-SRS-for-TSN-use-cases-1216-v01.pdf
21 Feb 2017 Presentation cr-seaman-paternoster-policing-scheduling-0217-v02.pdf
13 Mar 2017 Presentation cr-seaman-paternoster-policing-scheduling-0317-v03.pdf
15 Mar 2017 Presentation cr-seaman-paternoster-ppt-0317-v01.pdf
06 Nov 2017 Presentation cr-specht-yang-1117-v01.pdf
22 May 2018 Presentation cr-specht-d04-0518-v03.pdf
11 Sep 2018 Presentation cr-specht-d0-5-last-comments-v00.pdf

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